First is that a “remnant form” of an ancient, highly advanced human civilization is still hanging around, observing us.

"The longer human civilization lasts ... but suggest that if there were other ancient advanced species to be found, they would be discovered through exploration of elemental and compositional ...

If an extraterrestrial civilization existed with technology comparable to ours, would they be able to detect Earth?

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien astronomers could also be scanning Earth.

Players will oversee the growth of a human civilization from early settlements to an advanced culture and defeat threats from foreign civilizations. Players can win the game through a range of ...